ZHU250CL hardness testing machine

Combining the best

The ZHU250CL hardness tester employs the latest technology, with closed-loop control for test load application. The modern system for test load application (closed loop) stands out because of its precision. Accuracy exceeds the requirements of all relevant ISO and ASTM standards.
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Two different PC controlled versions are available: as semi automatic systems based on Diamond Software or fully automatic systems based on the High Definition Software (HD).

Advantages and features

  • All in one - fast and reliable hardness testing with the ZHU250CL-S universal hardness tester from ZwickRoell:
  • The innovative force application system with closed-loop control provides a better signal-to-noise ratio compared with conventional instruments using load cells. The resulting force accuracy is significantly better than that defined in the relevant ISO and ASTM standards.
  • The unique 4-plus-4 turret allows Vickers, Knoop, Rockwell and Brinell hardness testing without the need for the time consuming task of changing objective lenses and indenters.
  • The unrestricted accessibility to the indenter optimizes the test procedure.
  • With the comfortable and variable test area, a wide variety of specimens can be tested at eye level.

Advantages of Diamond Hardness Testing Software

  • Operational control of the hardness tester is handled by Diamond hardness testing software:
  • The intuitive and workflow-based test procedure is adapted to the ZwickRoell testing software. Operators can move seamlessly from one testing machine to another - thus training is reduced to a minimum.
  • Diamond features a deep learning algorithm which mimics human behavior. It is especially suited for samples whose surface is not ideally suited to automatic indentation measurement. This improves the reproducibility of measurements between operators and sample preparation time is minimized.
  • All data associated with the test is stored automatically, for example, the test method, hardness value, tolerances, and an image of the indentation with measuring lines. This allows the operator to reassess an automatic measurement even after the test has been completed and the sample removed from the hardness tester.
Diamond Hardness Testing Software
Vickers Testing with Diamond Software

Advantages of HD software

  • Hardness tester operation and control via HD software (ZHμ.HD)
  • 4 megapixel USB camera
  • High-resolution overview image of specimen surface using either 2.5x lens or flatbed scanner in the fully automatic version
  • Easy positioning of test points in overview image
  • Automatic indentation measurement with shadow correction eliminates operator influence in determination of hardness values
  • Motorized X-Y tables with various travel lengths
  • Determination of effective case depth
  • Data transmission to testXpert III
  • RS232 or USB data export

Technical overview

Type

ZHU250CL-S

ZHU250CL-A

Test weights

0.5 to 250

0.5 to 250

kg

Test-weight resolution

0.1

0.1

kg

Vickers HV

Standard load steps from HV1

Standard load steps from HV1

Brinell HBW

Standard load steps with 1mm, 2.5mm and 5mm balls up to 250 kg

Standard load steps with 1mm, 2.5mm and 5mm balls up to 250 kg

Rockwell and Rockwell superficial

All scales as per standard

All scales as per standard

Display

PC monitor[1]

PC monitor[1]

Data input

PC keyboard[1]

PC keyboard[1]

Focusing

manual via handwheel

Automatic, motorized via lead screw

Optics

1.3-megapixel camera

1.3-megapixel camera

HD software

ZHμHD-S

ZHμHD-A

Indenter

up to 4 optional

up to 4 optional

Lenses

up to 4 optional

up to 4 optional

Data export

RS232/USB

RS232/USB

Test area (height x depth)

379 x 150

379 x 150

mm

Dimensions

600 x 1100 x 400

600 x 1100 x 400

mm

Weight

150

150

kg

Electrical supply

3A single-phase, 240/120V, switchable

3A single-phase, 240/120V, switchable

  1. PC, monitor and keyboard included in delivery.

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Customer Case

Customer Case Johann Maier

Teaser Box Image
  • Hardness tester operation and control via intuitive HD software
  • High-resolution overview image of specimen surface via scan function

Combining the best - cutting-edge hardness testing

Mr. John Piller
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